Re: Profile monitor for many users
Re: Profile monitor for many users
- Subject: Re: Profile monitor for many users
- From: Peter Miles <email@hidden>
- Date: Fri, 29 Apr 2011 11:56:02 +1200
On 28/04/2011, at 7:14 PM, Matthew Finlay wrote:
Hi John,
I can now understand why this approach was taken when apple were
developing this architecture for use with their manual color
calibration
utility.
Despite the "usefulness" of Apple's "Calibrate" utility to people who
may need a quick fix and do not want to pay for a spectrophotometer or
colorimeter to calibrate their monitor, IMO very few "professionals"
would actually use this software as it is based on visual correction
which is arbitrary.
The current norm for professional users is to calibrate their monitor
using a measuring device such as those described above. With many
currently available monitor profiling software packages it is now also
possible to verify how accurate a display/display profile
combination is
through a series of measurements and comparisons. So to answer your
questions:
Q.) "You can have more than one admin user, so what happens if they
disagree on which profile all other users should use?"
A.) It is possible to prove which profile is more suited to the
display.
Use the most correct profile.
Hi John and Matthew
We currently force display profiles in our student multi-user
environment photography dept computer labs. But I am wondering about
other alternatives.
For us in our photo department at massey university, Its the
students that have not previously expressed a preference for monitor
profiles for a specific workstation that concern me. Currently the
default behavior of the OS is to force the initial monitor profile
choice for them, to the system default.
I find it frustrating that while we provide a good custom monitor
profiles on the HD of each work station, the OS does not allow us to
select any of them as the initial choice for users that have not
previously expressed any preference for a monitor profile.
Q.) "Does the most recent admin profile choice override the previous
choice of another admin user?"
A.) Yes. That way a monitor can be continually re-profiled over
time to
adjust for drifts in it's behavior.
In a multi user system there is also the reality that in generating
the new monitor profile (by admin user-2) that the hardware settings
of the display may well have been changed, rendering admin users-1's
monitor profile less than wonderful anyway.
Q.) "Won't that come as a surprise to the original admin user?"
A.) Not if the color is being managed correctly.
To some extent, it is already a surprise with the current system in a
multi user environment. (In addition to the reason above)
Display brightness is not a personal user option. There is no
guarantee that monitor brightness will be the same for original-admin-
user next time they log on. So even with the current arrangement,
their profile may no longer describe the behavior of the display
next time they log in.
We currently take a 'window-grab' of the brightness slider position
at the time of profile generation. For color critical work we suggest
to our photography students to open the 'window-grab' of the
brightness slider and compare it with the position of the brightness
slider in monitor/system prefs. In case a previous user has changed
it. Not the most elegant solution.
You may see this as a "request" but to professional users it is
really a
"requirement" of any system which allows its users to manage color
across an environment with multiple users.
I guess the real question is one of responsibility though, do you see
this as the responsibility of apple to create this functionality or do
you feel that the software developers who create this kind of product,
will have to try to create their own customized ways to bypass this
issue?
Regards
Matt
-----Original Message-----
From: John Gnaegy [mailto:email@hidden]
Sent: Friday, April 22, 2011 5:48 AM
To: Forum ColorSync
Cc: Matthew Finlay; MARK SEGAL
Subject: Re: Profile monitor for many users
This isn't a flaw, a bug, or broken. I know it's much more
dramatic to
portray it that way so if you want to, sure go for it. But that's not
what it is.
It's intentionally designed to allow a user choices over the
calibration
of their display for white point and gamma. It's intentionally
designed
to allow a user to create multiple profiles reflecting these choices.
What you are describing, letting an admin user disallow all other
users
from having that choice, is a feature request. Feature request is not
the same as "it's flawed now". You can have more than one admin
user,
so what happens if they disagree on which profile all other users
should
use? Does the most recent admin profile choice override the previous
choice of another admin user? Won't that come as a surprise to the
original admin user?
I understand the situation you describe, you want to be able to manage
this choice for multiple users. Ok, that's a request. You don't
really
need to go past "request" and into a rant about how flawed it is
and how
horrible Apple is. There's plenty of internet for that, but not here.
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